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16142 results in Animal behaviour

Page 806 of 808

  • 9 - Recruitment and the non-territorial flock

  • I. J. Patterson
  • Illustrated by Chris Furse
  • Book:
    The Shelduck
    Published online:
    04 August 2010
    Print publication:
    21 October 1982, pp 218-236

  • Summary

    On reaching adulthood the young animal faces the problem of settling into the patch of habitat which may be its home for the rest of its life. The selection of an area is crucial to the individual's genetic fitness since it may affect both survival and breeding success and thus the total number of progeny produced in the animal's lifetime. Many individuals settle preferentially in their natal area, but others emigrate and face a choice between different regions for settlement. Selection of an area may depend mainly on assessment of the resources available but should also take into account the degree of competition for them. The response of individuals to increasing competition may limit the total number of young which settle in a local population and this may be important in the limitation of density.

    In many territorial species, recruitment occurs in two stages, firstly to the non-territorial flock and then from there to the attainment of a breeding territory, sometimes several years later (Charles, 1972). In this chapter I will describe the return of young adult shelducks to the flock, the factors affecting settlement and the possible consequences for population density.

    Return of the young

    After dispersing for their first winter, many young shelducks return to their natal area, mostly when about one year old. Of 60 Ythan-reared ducklings (ringed before fledging) which returned, 45 per cent were first seen as yearlings, 40 per cent as two-year-olds and 15 per cent at three years old (Patterson et al., in press b).

Marine Biodiversity Records
  • Cambridge University Press ceased publication of Marine Biodiversity Records on the completion of Volume 8, 2015.From Volume 9 the Journal is published by BioMed Central as a wholly Open Access journal. Please visit the Journal’s new homepage at http://www.mbr.biomedcentral.com/.Cambridge first published Marine Biodiversity Records in 2008, as part of a major investment by the Marine Biological Association of the United Kingdom and Cambridge University Press to improve dissemination of good science in the field, and as a result of the successful growth of the Journal of the Marine Biological Association of the United KingdomCambridge continues to publish and develop Journal of the Marine Biological Association of the United Kingdom.Frequency: 1 Volume(s) per year

Journal of the Marine Biological Association of the United Kingdom
  • Published for: The Marine Biological Association of the United Kingdom
  • Journal of the Marine Biological Association UK (JMBA) is an international journal, publishing original research and reviews on all aspects of marine biology, to support the aims of the MBA. The topics of present interest for JMBA are: - Marine ecology, behaviour and fisheries; - Biodiversity and population studies of marine ecosystems, especially potential impacts of global warming, ocean acidification and climate change on ecosystem resilience; - Physiology, biochemistry, genetics and molecular biology of marine organisms, including microbiology, particularly related to the integrative ecophysiology of marine organisms - Taxonomic syntheses, including molecular phylogenies; - Morphology, life history and developmental biology of marine organisms, especially model systems; - Chemical and physical oceanography, as directly relevant to marine biology; - Marine environmental health, and in particular its relationship to human health and well-being. In addition to papers describing original research, the journal will also publish short reviews and original viewpoints on topics of current marine biological interest.

Page 806 of 808